CN102675989B

CN102675989B - Coating liquid used for surface of environment-friendly rich mineral paper

Info

Publication number: CN102675989B
Application number: CN201210188788.4A
Authority: CN
Inventors: 孔令发
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-05
Filing date: 2012-06-05
Publication date: 2014-04-02
Anticipated expiration: 2032-06-05
Also published as: CN102675989A

Abstract

The invention discloses a coating liquid used for the surface of environment-friendly rich mineral paper, which solves the problems of harsh surface handfeel, lack in gloss, low strength, poor bending performance and the like of the paper caused by the existing product. The coating liquid comprises the following components in percentage by weight: 14.8%-17.2% of butadiene styrene rubber latex, 31.0%-36.0% of inorganic mineral powder, 33.5%-42.7% of pure water, 0.4%-0.5% of glycol, 0.22%-0.25% of dispersing agent, 0.11%-0.13% of antifoaming agent, 0.18%-0.21% of thickening agent, 9.7%-11.3% of PVA (poli vinyl alcohol)-S and 0.8%-1.0% of lubricating agent. The invention also provides a preparation method of the coating liquid. The surface handfeel, the flatness, the flexibility and the printing performance of the environment-friendly paper can be observably improved, and the surface strength of the paper is improved.

Description

A kind of coating fluid for environmentally-friendly stone paper surface

Technical field:

The present invention relates to a kind of coating fluid, relates to or rather a kind of coating fluid for paper.

Background technology:

Environment protecting paper (stone paper), come across the earliest 20th century six the seventies Japan and Germany etc., to the eighties in 20th century, the Soviet Union has also successfully developed " stone paper ", " stone paper " that China produces the earliest appears at Taiwan.It is the ecological paper that a kind of non-wood pulp, non-paper pulp are raw material, the abundantest Mineral resources calcium carbonate in the earth's crust of take is main raw material, take macromolecular material and multiple inorganics is auxiliary material, utilize the macromolecule interfacial principles of chemistry and filling-modified technology, a kind of reversibility recycle processing through special process, the novel papermaking with modern technologies feature.

But this paper (uncoated paper also claims body paper), surperficial feel is coarse, lacks gloss, intensity is low, and bending performance is poor waits deficiency, thereby need to carry out surface treatment to body paper, improve performance, meet the different demands of cultural paper, package paper and decoration paper using.

Summary of the invention:

The object of the invention is to overcome the deficiencies in the prior art, a kind of coating fluid that improves body paper surface property is provided.

Coating fluid for environment protecting paper body paper surface of the present invention, is characterized in that: described coating fluid composition and mass percent thereof are:

SBR emulsion 14.8%～17.2%, inorganic mineral powder 31.0%～36.0%, pure water 33.5%～42.7%,

Ethylene glycol 0.4%～0.5%, dispersion agent 0.22%～0.25%, defoamer 0.11%～0.13%, thickening material 0.18%～0.21%, PVA-S 9.7%～11.3%, lubricant 0.8%～1.0%.

Described inorganic mineral powder is light calcium carbonate, talcum powder.

Described defoamers is organosilicon type defoamer, and dispersion agent is polyacrylic acid phosphorus organic dispersing agent, and thickening material is CMC, and lubricant is liquid paraffin.In mentioned component, ethylene glycol is antifreezing agent, and SBR emulsion and PVA-S are tackiness agent, and inorganic mineral powder is filler.

The method of preparing the above-mentioned coating fluid for environment protecting paper surface is: appropriate ethylene glycol is joined after a certain amount of pure water stirs and adds dispersion agent, defoamer, CMC, PVA-S, by mechanical stirring, mix, add again quantitative light calcium carbonate, talcum powder further to stir, mix, then after adding a certain amount of SBR emulsion to stir certain hour, add lubricant, set aside for use after continuing to stir.

Raw materials used weight as mentioned above, specifically comprises the following steps:

1. take pure water, pour in container, open stirrer.

2. add ethylene glycol, stirrer reaches 300 and turns, until stir.

3. add dispersion agent, stirrer rotating speed is constant, until stir.

4. add defoamer, stirrer rotating speed is constant, until stir.

5. slowly add CMC, stirrer rotating speed is constant, stir about 30 minutes.

6. slowly add PVA-S, stirrer rotating speed is constant, stir about 10 minutes.

7. rotating speed is adjusted to 800 and turns, then slowly add respectively light calcium carbonate and talcum powder, then stir 90 minutes.

8. stirrer adjustment of rotational speed to 700 is turned, slowly add SBR emulsion, stir 90 minutes.

9. stirrer adjustment of rotational speed to 400 is turned, slowly add lubricant, stir 20 minutes.

10. adjustment of rotational speed to 200 is turned, stir set aside for use 10 minutes.

According to formula and the different requirements to coating fluid viscosity, in above-mentioned steps 9, keep rotating speed constant, add a certain amount of pure water, stir 20 minutes.

Styrene-butadiene rubber(SBR), because have adjustable, low temperature resistant, the advantage such as flexibility is good and wear resistance is good of molecular structure soft durometer, is widely used in the fields such as coating, finishing agent elastomerics, dyeing and printing auxiliary and tackiness agent.Along with the enhancing of people to environmental consciousness, the styrene-butadiene rubber(SBR) that the water of take is dispersion medium becomes the important directions of research and application.

As shown from the above technical solution, the present invention has following beneficial effect: the surface strength of significantly improving environment protecting paper surface feel, planarization, flexibility, printing performance and improving paper.Through experiment showed, that its smoothness of paper being coated with improves 5-8 doubly, deflection improves 2-3 doubly, and tearability improves 20%-40%, and sur-face peeling intensity improves more than 1 times, and the inking effect of printing also improves greatly.

Embodiment:

Embodiment 1

Raw material and the weight of coating fluid used are as shown in the table: table Raw weight unit is gram

Raw material	Formula one	Formula two	Formula three	Formula four	Formula five
						Pure water	620	654	626	575	552
EG (ethylene glycol)	7	7.4	7.6	7.9	8.1
						Dispersion agent	3.7	3.9	4	4.2	4.3
Defoamer	1.8	1.9	2	2.1	2.2
						CMC	3	3.1	3.2	3.4	3.5
PVA-S	161	170	174	183	187
						Light calcium carbonate	426	450	461	484	500
Talcum powder	84	88	91	95	92
						SBR emulsion	245	258	265	278	284
Lubricant	13.7	15	15.4	16.2	16.6
						Pure water	84	0	0	0	0
Gross weight	1649.2	1649.3	1649.2	1648.8	1649.7
						Gu composition (massfraction) %	39±1	41.1±1	42.2±1	44.3±1	45.3±1
Viscosity (Pas)	100±20	150±20	210±20	300±20	260±20

Embodiment 2

Adopt the preparation method's of above-mentioned formula concrete technology step to be: to take and fill a prescription 1 as example

1. take 620 grams of pure water, pour in container, open stirrer.

2. add 7 grams of ethylene glycol, stirrer reaches 300 and turns, until stir.

3. add 3.7 grams of dispersion agents, stirrer rotating speed is constant, until stir.

4. add 1.8 grams of defoamers, stirrer rotating speed is constant, until stir.

5. slowly add 3 grams of CMC, stirrer rotating speed is constant, stir about 30 minutes.

6. slowly add 16 grams of PVA-S, stirrer rotating speed is constant, stir about 10 minutes.

7. rotating speed is adjusted to 800 and turns, then slowly add respectively 426 grams of light calcium carbonates and 84 grams of talcum powder, then stir 90 minutes.

8. stirrer adjustment of rotational speed to 700 is turned, slowly add 245 grams of SBR emulsions, stir 90 minutes.

9. stirrer adjustment of rotational speed to 400 is turned, slowly add 13.7 grams of lubricants, stir 20 minutes.

10. adjustment of rotational speed to 200 is turned, stir set aside for use 10 minutes.Now the viscosity of gained coating fluid is 140Pas left and right.

In above-mentioned steps 9: keep rotating speed constant, add 84 grams of pure water, stir 20 minutes, then adjustment of rotational speed to 200 is turned, stir set aside for use 10 minutes.Now the viscosity of gained coating fluid is 100Pas left and right.

Claims

1. for the coating fluid on environmentally-friendly stone paper surface, it is characterized in that: described coating fluid is comprised of following composition and mass percent thereof:

SBR emulsion 14.8%～17.2%, inorganic mineral powder 31.0%～36.0%, pure water 33.5%～42.7%, ethylene glycol 0.4%～0.5%, dispersion agent 0.22%～0.25%, defoamer 0.11%～0.13%, thickening material 0.18%～0.21%, PVA-S9.7%～11.3%, lubricant 0.8%～1.0%; Described inorganic mineral powder is light calcium carbonate and talcum powder.

2. a method of preparing the coating fluid for environmentally-friendly stone paper surface as claimed in claim 1, is characterized in that comprising the following steps:

(1) take pure water, pour in container, open stirrer;

(2) add ethylene glycol, stirrer reaches 300 and turns, until stir;

(3) add dispersion agent, stirrer rotating speed is constant, until stir;

(4) add defoamer, stirrer rotating speed is constant, until stir;

(5) slowly add CMC, stirrer rotating speed is constant, stir about 30 minutes;

(6) slowly add PVA-S, stirrer rotating speed is constant, stir about 10 minutes;

(7) rotating speed is adjusted to 800 and turns, then slowly add respectively light calcium carbonate and talcum powder, then stir 90 minutes;

(8) stirrer adjustment of rotational speed to 700 is turned, slowly add SBR emulsion, stir 90 minutes;

(9) stirrer adjustment of rotational speed to 400 is turned, slowly add lubricant, stir 20 minutes;

(10) adjustment of rotational speed to 200 is turned, stir set aside for use 10 minutes.

3. method as claimed in claim 2, is characterized in that: after above-mentioned steps (9) completes, maintenance rotating speed is constant, adds a certain amount of pure water, stirs 20 minutes.